(In reply to Steve Fink [:sfink] [:s:] from comment #12) I took a profile of this: https://share.firefox.dev/3ynRtfp It's doing very frequent GC (every ~35ms), although the GCs themselves aren't that bad (mac pause ~6.5ms) and the proportion of GC time is around 15%.
Bug 1375566 Comment 13 Edit History
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(In reply to Steve Fink [:sfink] [:s:] from comment #12) I took a profile of this: https://share.firefox.dev/3ynRtfp It's doing very frequent GC (every ~35ms), although the GCs themselves aren't that bad (max pause ~6.5ms) and the proportion of GC time is around 15%.